filtrexx sediment trap (siltsoxx

114 | Filtrexx® Low Impact Design Manual | Version 10.0

PURPOSE & DESCRIPTIONFiltrexx® SiltSoxx™ is a three-dimensional tubular runoff and erosion control device used for Filtrexx® Sediment traps - temporary dry pond sediment containment detention systems used to capture sediment and settle suspended solids in runoff from disturbed soils less than 5 acres (2 ha). Sediment traps are also used to capture sediment and settle suspended solids from detention pond outfalls and/or potential overflows. Sediment traps can be converted to, or retrofitted for, permanent (post-construction) Low Impact Development (LID) stormwater quality detention systems.

APPLICATIONSediment traps are typically installed down slope from disturbed soils where runoff capture and detention is feasible and settling of suspended solids is required; or where post-construction storm water runoff quality is a concern and pollutant reduction and/or LID practices are required. Applications include:• Individual sediment detention & containment

zones where drainage areas do not exceed 5 acres (2 ha).

• Sediment and storm water detention pond outfall channels where additional removal of sediments and soluble pollutants are required before final discharge.

• Emergency overflow for retention or detention sediment or storm water containment systems.

• Where land area is limited or land disturbance, grading, and/or construction of a sediment pond is undesirable or not feasible.

• Where sediment particle sizes are predominantly greater than 0.002 mm (clay).

• Where post-construction storm water turbidity, TSS, phosphorus, nitrogen, bacteria, heavy metals, or petroleum hydrocarbons need to be removedprior to discharge or entry into receiving waters.

1.9ADVANTAGES AND DISADVANTAGES

Advantages • Allows for trapping and settling of suspended solids without major excavation, land disturbance, or pond construction. • Easily customized to fit most types of watersheds/ drainage areas. • Installation of sediment traps require no trenching, therefore soil is not disturbed upon installation or removal. • Installation of sediment traps can reduce clearing, grubbing, and topsoil removal costs. • Sediment traps can be installed year-round in difficult soil conditions such as frozen or wet ground, around/on top of sensitive tree roots, and dense and compacted soils, as long as stakes can be driven. • Sediment traps function to disperse flow across the trap barrier, thereby reducing concentrated flows and recreating predevelopment flow patterns that mimic nature. • Sediment traps are easily implemented as a treatment in a greater treatment train approach to erosion and sediment control. • Organic matter and humus colloids in Filtrexx® FilterMedia™ (filler material in sediment traps) have the ability to bind and adsorb phosphorus, metals, and hydrocarbons that may be in storm water runoff. • Microorganisms in FilterMedia have the ability to degrade organic pollutants and cycle captured

Use at Basin Outfall.

SECTION 1: CONSTRUCTION

Filtrexx® Sediment Trap(SiltSoxx™)

Construction Activities | Section 1: Erosion & Sediment Control | 115

1.9. Filtrexx® Sediment Trap

SECTION 1: CONSTRUCTION

nutrients in storm water runoff. • Filtrexx® Soxx™ (the mesh netting containment system) allows sediment traps to be placed in areas of high concentrated flow. • Sediment traps can be direct seeded at time of application to provide greater stability and filtration capability once vegetation is established. • FilterMedia is organic and can be left on site after permanent stabilization is complete, to be used in landscape design and/or seeded and planted with permanent vegetation. • FilterMedia improves existing soil structure if spread out and used as a soil amendment after construction activity is complete. • Biodegradable or photodegradable Soxx can be left on site after construction activity and may eliminate the need for removal and labor and disposal costs. • If vegetated and left on-site, sediment traps can be used to filter and infiltrate post- construction runoff. • Sediment traps are less likely to obstruct wildlife movement and migration than planar/silt fence or sediment pond practices.• Soxx for sediment traps are available in 8 in. (200mm), 12 in. (300mm), 18 in. (450mm), 24 in. (600mm), and 32 in (800mm) diameters for customized applications and challenging situations. • Sediment traps may assist in qualification for

LEED® Green Building Rating and Certification credits under LEED Building Design & Construction (BD+C), New Construction v4. Awarded credits may be possible from the categories of Sustainable Sites, Water Efficiency,

Materials & Resources, and Innovation. Note: LEED is an independent program offered through the U.S. Green Building Council. LEED credits are determined on a per project basis by an independent auditing committee. Filtrexx neither guarantees nor assures LEED credits from the use of its products. LEED is a trademark of the U.S. Green Building Council.

Disadvantages• If filler material of Soxx is not Filtrexx® CertifiedSM FilterMediatm, performance may be diminished. • If not installed correctly, maintained or used for a purpose or intention that does not meet specifications performance may be diminished. • If sediment traps are not adequately sized to capture all runoff from the design watershed and/ or storm overflow occurs, performance will be greatly diminished. • If sediment particles sizes are less than 0.002 mm (clay), removal efficiency may be diminished unless significant detention time occurs. Additional additives can be used to target these smaller sediments. • If land surface is extremely bumpy, rocky, or changes elevation abruptly ground surface contact to Soxx may be diminished thereby adversely effecting performance.

MATERIAL SPECIFICATIONSSediment traps use only photodegradable or biodegradable Soxx netting materials available from Filtrexx International, and are the only mesh materials accepted in creating Filtrexx Sediment traps for any purpose. For Soxx tubular mesh material specifications see Table 9.1.

FILTERMEDIAtm CHARACTERISTICSSpecifications for Filtrexx Sediment trap use only Filtrexx Certified FilterMedia which is a coarse composted material that is specifically designed for removal of solids and soluble pollutants from storm water runoff. FilterMedia can be altered or customized to target specific pollutants in runoff as approved by the Engineer or Filtrexx International. All Filtrexx

Certified FilterMedia has been third party tested and certified to meet minimum performance criteria defined by Filtrexx International. Performance parameters include: hydraulic flow through rate, total solids removal efficiency, total suspended solids removal efficiency, turbidity reduction, nutrient removal efficiency, metals removal efficiency, and motor oil removal efficiency. For information on

ADVANTAGESLOW MED HIGH

Installation Difficulty

Durability

Sediment Control

Soluble Pollutant Control

Runoff Flow Control

Life Cycle Cost

ü

ü

üü

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the physical and chemical properties of Certified FilterMedia refer to Certified FilterMedia Specifications in Section 5.1. Look for the Filtrexx Certified FilterMedia Seal from our international network of Filtrexx Certified Installers.

PERFORMANCEPerformance testing and research on Sediment control has been extensive. For a summary of performance testing, research results, and design specifications see Table 1.2. For copies of publications, full reports, or Tech Link summaries contact Filtrexx International. Successful bidders will furnish adequate research support showing their manufactured product meets or exceeds performance and design criteria outlined in this standard specification. Research or performance testing will be accepted if it meets the following criteria: conducted by a neutral third party, utilizes standard test methods reported by ASTM or referenced in a peer reviewed scientific journal, product and control treatments are tested in triplicate, performance results are reported for product and control (control should be a bare soil under the same set of environmental and experimental conditions), results are peer reviewed, results indicate a minimum 60% TSS removal efficiency and a minimum hydraulic flow through rate of 5 gpm/ft2. Bidders shall attach a copy of the research report indicating test methodologies utilized and results. Note: the Contractor is responsible for establishing a working erosion and sediment control system and may, with approval of the Engineer, work outside the minimum construction requirements as needed. Where the Sediment trap deteriorates or fails, it shall be repaired or replaced with an effective alternative.

DESIGN CRITERIA Sediment traps are designed to temporarily detain sediment-laden runoff from disturbed soils prior to final stabilization. The sediment and pollutant containment process characteristic to Sediment traps combines both filtering and deposition of suspended solids. Because Sediment trap is a dry pond system there is little or no re-suspension of settled particulates with successive runoff events and maintenance is generally lower relative to wet pond systems. Sediment traps also allow infiltration of detained storm water, thereby reducing flow and pollutant loads, and disperse

detained runoff across the trap barrier, reducing concentrated flows and mimicking predevelopment flow patterns. Installation and maintenance is especially important for proper function and performance. For engineering design details see Figure 9.1. For a summary of specifications for product/practice use, performance and design see Table 9.2.

Site Orientation: Sediment traps should be placed on low grade or level contours to maximize runoff-sediment volume containment. Flow of water should be perpendicular to the sediment trap at impact (See Figure 9.1). Placing sediment traps on compacted or undisturbed soil will reduce the potential for undermining. Sediment traps shall not be placed on fill soil or slopes. Backfilling with FilterMedia will also aid to reduce undermining potential. In order to prevent water flowing around the ends of sediment traps, the ends of the sediment trap Soxx must be constructed pointing upslope so the ends are at a minimum 1 ft (30 cm) higher elevation than the lowest point (mid-section) of the sediment trap. The mid-section of the sediment trap shall be the point of lowest elevation. A minimum of 10 linear ft (3m) per end each placed at a 30 degree angle is recommended.

Post-construction or Permanent Retrofits:For long-term temporary or permanent post-construction or retrofitted systems Sediment traps can be direct-seeded to allow vegetation established directly in the Soxx. Vegetation on and around the sediment trap will assist in slowing runoff velocity for increased deposition and filtration of pollutants. Vegetated sediment trap may be left on site to filter and infiltrate post-construction storm water flows from developed and/or impervious surface areas. The option of adding vegetation will be at the discretion

Large Sediment Storage Capacity.



of the engineer. No additional soil amendments or fertilizer are required for vegetation establishment with the sediment trap system.

Runoff Flow:Runoff flow and ponding depth shall maintain a minimum 12 in (30 cm) vertical distance from the maximum waterline (freeboard) to the top of the sediment trap. Filtrexx Slope Interruption (Section 1.5) should be used to reduce the inflow energy of stormwater and Compost Erosion Control Blanket (Section 1.8) should be used to reduce the volume of sediment (and potentially runoff ) flowing to the sediment trap. Filtrexx Runoff diversion (Section 1.6) should be used to divert runoff flowing from undisturbed and/or permanently stabilized areas to reduce design size requirement of the sediment trap. If concentrated flow is directed or channeled to sediment trap, energy flow dissipaters shall be used at the base of the channel/concentrated flow prior to contact with Soxx. Dissipaters shall be placed at a minimum distance of 20 ft (6 m) from the base course of the sediment trap.

Construction:Sediment traps shall have a minimum effective height of 3 ft (90 cm) (or settling depth of 2 ft or 60 cm) to allow for deposition of suspended solids (Goldman et al., 1986). Additional height and runoff-sediment storage volume can be attained by excavating directly upslope from the sediment trap. Excavation shall not undermine the structure and integrity of the sediment trap system. For stability and ballast against constant water pressure (head) sediment traps shall have a 1H:1V construction ratio, although the base may be wider for additional ballast. Larger diameter Soxx (18 in, 24 in, 32 in [450mm, 600mm, 800mm]) shall be used at the base of the sediment trap system with increasingly smaller diameter Soxx (8 in, 12 in, 18 in [200mm, 300mm, 450mm]) placed on top of the layer below (See Figure 7.1). Where Soxx are sleeved to join Soxx for long Sediment trap designs, material overlap shall be a minimum of 4 ft (120 cm) and shall be staked where material overlaps using 2 stakes, 2 ft (60 cm) apart. Soxx shall not be joined (sleeved) where concentrated flow contacts the Soxx or enters the sediment trap system. Additionally, sleeved joints shall not be located at elevation low points within the sediment trap.

Sediment Deposition:Sediment basins and traps should generally remove sediments less 0.05 mm, although performance varies

widely (Fifield, 2001). While total suspended solids removal efficiency for Soxx is 78%, removal of fine silts (0.02 mm) and clays (0.002) typically requires storage time to allow for sediments to deposit within the water column (or ponded area). Typically, the longer the residence time and the greater the storage surface area the greater the removal of fine suspended solids. While fine sand may fall approximately 1 cm/sec, a silt particle will fall 1 cm/min, and a clay particle will fall 1 cm/5 hrs (Fifield, 2001). As an example, it takes a 0.001 mm clay particle 100 times as long to fall the same distance as a 0.01 silt particle (Fifield, 2001). Use Stoke’s Law to calculate settling velocity of sediments by:

Vs = [g × (s-1) × d2] ÷ (18 × µ)

Where:Vs = settling velocity (cm/sec)g = acceleration of gravity (980 cm/sec2)µ = kinematic viscosity of a fluid (cm2/sec2)s = specific gravity of a particle d = diameter of a particle (cm)

Sizing and Design Area:Sediment traps are typically defined as structures used to treat drainage areas less than 5 acres (2 ha); whereas, sediment basins are used for greater drainage areas (Goldman et al, 1986). Depending on known variables and considerations for design, there are several options for designing the size of a Sediment trap.

Option #1:To determine the minimum constructed fascia area (length x height [from ground to max water line])

Stacking Method for Sediment Traps.


of Sediment trap required to prevent overflow, peak flow rate to the Sediment trap must be known or determined. Peak flow rate from a drainage area or small watershed can be determined using the Rational Formula:

Q = c × i × a

Where:Q = peak runoff flow ratec = runoff coefficient*

i = rainfall intensitya = area of watershed/drainage area

Once Q (peak flow rate) is known the following equation can be used to design the required fascia area of Sediment trap to prevent overflow.

Q/5 = A

Where:Q = peak flow rate to Sediment trap (L/sec)5 = flow through rate of Sediment trap** (L/sec/m2)A = area of Sediment trap fascia (m2), [A = length (m) × depth of max water line (m)]

For English Units:Q/0.984 = A

Where:Q = peak flow rate to Sediment trap (cfm) 0.984 = flow through rate of Sediment trap** (cfm/ft2)A = area of Sediment trap fascia (ft2, [A = length (ft) × depth of max water line (ft)]

* See Section 2.1 Stormwater Blanket Specification and Design for runoff coefficient for this Filtrexx BMP** Includes safety factor for minor compacting during construction and sediment accumulation behind barrier.

Option #2:The USEPA (1998) requires that sediment containment systems be designed to capture runoff from the 2 yr 24 hr rainfall event. For the eastern half of the US this ranges from 2 in (50 mm) to 6 in (150 mm) of rainfall, with an average of 3 in (75

mm) (SCS, 1986). The USEPA (1998) requires that only the first 1 in (25 mm) of runoff be contained for a 3 in (75 mm) storm; for 1 acre this is equivalent to 3600 ft3 (252 m3/ha). Under this design scenario, 3600 ft3 runoff per drainage acre must be contained. Consult the Soil Conservation Service (1986) 2-yr 24-hr map for the design storm event value for your region.

Option #3:This option may be used to determine minimum runoff volume containment, height of Sediment trap, or storage surface area if 2 of the variables are known (Fifield, 2001).

Q = D × A

Where:Q = runoff volume (m3)D = depth of max water line (m)A = surface area of containment (m2)

Option #4:Settling velocity of sediment can have an effect on runoff storage capacity for the Sediment trap. If settling velocity is known (Stoke’s Law), and the outflow rate of the containment system is known, minimum surface area of containment can be determined by:

SA = (120 × Q) ÷ Vs

Where:SA = minimum surface area (m2)Q = outflow rate of containment system (m3/sec)Vs = settling velocity of sediment particle (cm/sec)

Option #5The Filtrexx Sediment Control Design Tool may also be used to determine the length and height of a sediment trap to prevent overflow of sediment-laden runoff from a known watershed/drainage area and design storm (Keener et al, 2006). For instructions and a copy of the Filtrexx Design Tool, refer to the Filtrexx Design Manual, Section 5.4 and 5.4a.

INSTALLATION1. Sediment traps shall meet Filtrexx Soxx Material

Specifications and use Filtrexx® CertifiedSm FilterMedia.

2. Contractor is required to be a Filtrexx® CertifiedSm



Installer as determined by Filtrexx International (877-542-7699). Certification shall be considered current if appropriate identification is shown during time of bid or at time of application. Look for the Filtrexx® CertifiedSm Installer Seal.

3. Sediment traps will be placed at locations indicated on plans as directed by the Engineer.

4. Sediment traps shall not be placed on fill soil or slopes, soft, or uneven ground.

5. Sediment traps must be installed on level contours. Field verification with laser level is strongly recommended.

6. Sediment traps should be installed at the base of the drainage area.

7. Filtrexx Runoff Diversion can be installed to divert runoff flows from undisturbed or stabilized areas from entering design area of sediment trap.

8. Filtrexx Slope Interruption may be installed upslope and with the runoff flow path to reduce flow energy entering sediment traps.

9. Concentrated flows, channels, or ditches directing flow into sediment traps shall employ energy flow dissipaters prior to flow contact with Soxx or entry into the sediment trap system. Dissipaters shall be placed at a minimum distance of 20 ft (6 m) from the base course of the sediment trap.

10. Sediment traps shall be installed so the effective height is at least 3 ft (90 cm).

11. Ends of sediment traps shall be at least 1 ft (30cm) higher in elevation than the mid-section. The mid-section shall be the lowest point of the trap.

12. Sediment traps shall be constructed so the horizontal base width is at least equivalent to the effective height (1H:1V).

Figure 9.3 Filtrexx® Design Tool™ for Sediment Control Applications.

Part A. Evaluation of ql

Part B. Predicted time and total flow to top filter.

linches/hr

Aacres

spercent

Qgpm

Lss

ftql

gpm/ft

0.063 2.2957 10 58.15 400 0.145

EffectiveD

inches

TimeOverflow

hrqo

gpm/hrD

inchesTotal Flow

gal/fFilter OKAY

time > tr

SiltsoxxTM

(Coarse Material) 0.145 12 9.6 99.1 865 OKAY

Silt Fence 0.145 36 30.6 97.5 851 OKAY

Step 1: Choose units. ft or m

Step 2: Choose input: Tr or l

Step 3: Choose input: A or W

Step 4: Input slopeStep 5: Input reduction runoff percent

Step 6: Input effective length of filter

Step 7: Input diameter/height of filter

Step 8: Find time to overflow filter and total flow/ft the filter can handle

Step 9: On figure find for given flow expected time to overflow filter

ft

Tr

1.5

W

400.00

10

10

siltsoxx (8,12,16) silt fence (24, 30)

400 400

12 36

total rainfall

width of area length of slope

storm duration inches

inches

ft

ft

%

%

ft: 250 43560452.588

hours: 24


13. Sediment traps sized and specified by fascia design area shall be installed so that the height is measured vertically not across the plane of the sediment trap face.

14. Additional runoff-sediment storage area can be created by over excavating the area immediately upslope of the sediment trap.

15. Soxx that are sleeved to create longer lengths shall not be placed in areas of concentrated flow, at the base of channels/ditches, or at the low point with the sediment trap system.

16. Soxx that are sleeved to create longer lengths shall be overlapped by a minimum of 4 ft (120 cm) and shall be staked where material over laps using 2 stakes 2 ft (60 cm) apart.

17. Stakes shall be installed through the middle of the Soxx using 2 in (50mm) by 2 in (50mm) by 3 ft (1m) wooden hardwood stakes on 10 ft (3 m) centers; 5 ft (1.5 m) on center staking may be used to increase stability. Stakes shall be placed in a pyramid configuration perpendicular to Soxx where stakes cross at the apex of the sediment trap. Stakes shall be joined and secured with wire wrapping at apex using 16 gauge or multi-strand 20 gauge wire allowing 12 in (30cm) of stake above the Soxx. All base layers shall be staked on 5 ft (1.5 m) centers. All base layers shall be staked on 5 ft (1.5 m) centers; placed opposite the pyramid staking; where staking is present every 2.5 ft (0.75 m). Half inch (12.5 mm) rebar may also be used when ground is frozen or extremely compacted.

18. Staking depth for all soil types shall be minimum 12 in (300mm) into native soil.

19. Soxx to receive additional layers shall be slightly compacted and leveled.

20. Loose FilterMedia shall be backfilled along the upslope side of the sediment trap, along seams, and within void spaces; thereby filling the seam between the soil surface and the sediment trap, improving sediment containment, and reducing undercutting potential.

21. If the sediment trap is to be left as a permanent filter or part of the natural landscape, it may be seeded at time of installation for establishment of permanent vegetation. The Engineer will specify seed requirements.

22. Sediment traps are not to be used in perennial, ephemeral, or intermittent streams.

See design drawing schematic for correct sediment trap installation (Figure 9.1).

INSPECTIONRoutine inspection should be conducted within 24 hrs of a runoff event or as designated by the regulating authority. Sediment traps should be regularly inspected to make sure they maintain their shape and are producing adequate hydraulic flow-through. If ponding becomes excessive, additional sediment traps may be required to reduce effective drainage area or sediment removal may be necessary. Sediment traps shall be inspected until area above has been permanently stabilized and construction activity has ceased.

MAINTENANCE1. The Contractor shall maintain the sediment trap

in a functional condition at all times and it shall be routinely inspected.

2. If the sediment trap has been damaged, it shall be repaired, or replaced if beyond repair.

3. The Contractor shall remove sediment at the base of the upslope side of the sediment trap when accumulation has reached 1/2 of the effective height of the sediment trap, or as directed by the Engineer. Alternatively, a new Soxx can be placed on top of the original structure creating more sediment storage capacity without soil disturbance.

4. Sediment traps shall be maintained until disturbed area above the device has been permanently stabilized and construction activity has ceased.

5. The FilterMedia will be dispersed on site once disturbed area has been permanently stabilized, construction activity has ceased, or as determined by the Engineer.

6. For long-term sediment and pollution control applications, sediment traps can be seeded at the time of installation to create a vegetative filtering system for prolonged and increased filtration of sediment and soluble pollutants (contained vegetative filter strip). The appropriate seed mix shall be determined by the Engineer.

DISPOSAL/RECYCLINGFilterMedia is a composted organic product recycled and manufactured from locally generated organic, natural, and biologically based materials. Once all soil has been stabilized and construction activity has been completed, the FilterMedia may be dispersed with a loader, rake, bulldozer or similar device and may be incorporated into the soil as an amendment or left on the soil surface to aid in permanent seeding or landscaping. Leaving the FilterMedia on site reduces removal and disposal costs compared to other



sediment control devices. The mesh netting material will be extracted from the FilterMedia and disposed of properly by the Contractor. The photodegradable mesh netting material (Soxx) may degrade if left on site. Biodegradable mesh netting material is available and may eliminate the need and cost of removal and disposal. METHOD OF MEASUREMENTBid items shall show measurement as 8 (200), 12 (300), 18 (450), 24 (600), 32 (800) inch (mm) diameter Filtrexx® Sediment Trap Soxx™/SiltSoxx™ per linear foot (or linear meter) specified layer, or Filtrexx Sediment trap per square ft (or square meter) installed. Engineer shall notify Filtrexx of location, description, and details of project prior to the bidding process so that Filtrexx can provide design aid and technical support.

ADDITIONAL INFORMATION For other references on this topic, including additional research reports and trade magazine and press coverage, visit the Filtrexx website at www.filtrexx.com

Filtrexx International, Technical Support61 N Clev-Mass Rd, Ste E, Akron, OH 44333877-542-7699 | 234-466-0810 (fax)www.filtrexx.com | [email protected] for complete list of international installers.

BactoLoxx, DuraSoxx, EarthBloxx, EnviroBloxx, EnviroSoxx, Filtrexx, GardenSoxx, GreenLoxx, GroSoxx, Let Nature Do It, MetalLoxx, NutriLoxx, PetroLoxx, and Trinity are Registered Trademarks of Filtrexx International.

BioSoxx, CECB [Compost Erosion Control Blanket], CSWB [Compost StormWater Blanket], DitchChexx, EdgeSaver, FilterCell, FilterMedia, FilterSoxx, GrowingMedia, InletSoxx, LivingWall, Lockdown, NitroLoxx, PhosLoxx, SiltSoxx, Soft Blocks, and Soxx are Trademarks of Filtrexx International.

Filtrexx Certified and its accompanying logo are Service Marks of Filtrexx International.The information contained herein may be subject to confidential intellectual property of Filtrexx International, including but not limited to US Patents 7,226,240; 7,452,165; 7,654,292; 8,272,812; 8,439,607; 8,740,503; 8,821,076; and 9,044,795 or Patents Pending and is the property of Filtrexx International.

Copyright 2005-2017, Filtrexx International, all rights reserved. Unauthorized reproduction prohibited.

REFERENCES CITED & ADDITIONAL RESOURCES American Association of State Highway Transportation Officials. 2003. Standard Specification for Transportation Materials and Methods of Sampling and Testing, Designation M9-03, Compost for Erosion/Sediment Control. Washington, DC

Faucette, L.B., K. Kerchner, and A. Vick. 2006. Sediment Storage Capacity of SiltSoxxtm vs. Silt Fence. Filtrexx® Tech Link #3314.

Faucette, L.B., H. Keener, M Klingman, and K. Kerchner. 2006. Design Capacity Prediction Tool for SiltSoxxTM and Silt Fence. Filtrexx® Tech Link #3313 (Description of Design Tool) and Filtrexx® Library #301 (Design Tool).

Faucette, L.B. 2006. Flow-Through Rate, Design Height, and Design Capacity of SiltSoxxTM and Silt Fence. Filtrexx® Tech Link #3304.Faucette, L.B. 2006. Design Height, Flow-Through Rate, and Slope Spacing of SiltSoxxtm and Silt Fence. Filtrexx® Tech Link #3311.

Faucette, L.B., and R. Tyler. 2006. Organic BMPs used for Storm Water Management. Proceedings of the International Erosion Control Association Annual Conference, Long Beach, CA 2006.

Faucette, B, F. Shields, and K. Kurtz. 2006. Removing storm water pollutants and determining relations between hydraulic flow-through rates, pollutant removal efficiency, and physical characteristics of compost filter media. Second Interagency Conference on Research in Watersheds, 2006 Proceedings. Coweeta Hydrologic Research Station, NC. Filtrexx® Library #106.

Faucette, B., Sadeghi, A., and K. Sefton. 2006. USDA ARS - Evaluation of Compost Filter Socks and Silt Fence in Sediment and Nutrient Reduction from Runoff. Filtrexx® Tech Link #3308

Faucette, L.B. and A. Vick. 2006. LEED Green Building Credits using Filtrexx® Organic BMPs. Filtrexx® Tech Link #3301.


Faucette, L.B. A. Vick, and K. Kerchner. 2006. Filtrexx®, Compost, Low Impact Development (LID), and Design Considerations for Storm Water Management. Filtrexx® Tech Link #3306.

Faucette L.B., C.F. Jordan, L.M. Risse, M. Cabrera, D.C. Coleman, and L.T. West. 2005. Evaluation of Storm Water from Compost and Conventional Erosion Control Practices in Construction Activities. Journal of Soil and Water Conservation. 60:6: 288-297.

Faucette, L.B. 2005. Removal and Degradation of Petroleum Hydrocarbons from Storm Water with Compost. Filtrexx® Tech Link #3307.

Faucette, L.B. 2005. A Comparison of Performance and Test Methods of SiltSoxxtm and Silt Fence. Filtrexx® Tech Link #3302.

Faucette, L.B., N. Strazar, A. Marks. 2006. Filtrexx® Polymer and Flocculent Guide. Filtrexx® Library #601.

Fifield, J. 2001. Designing for Effective Sediment and Erosion Control on Construction Sites. Forester Press, Santa Barbara, CA.

Goldman, S. J., K. Jackson, and T.A. Bursztynsky. 1986. Erosion and Sediment Control Handbook. McGraw-Hill Book Company, New York, NY.

Keener, H., B. Faucette, and M. Klingman. 2006. Flow-through rates and evaluation of solids separation of compost filter media vs. silt fence in sediment control applications. 2006 American Society of Agricultural and Biological Engineers Annual International Conference, Portland, OR. Paper No. 062060.

Marks, A., R. Tyler, and B. Faucette. 2005. The Filtrexx® Library. Digital publication of support tools for the erosion industry. www.filtrexxlibrary.com.

Marks, A., and R. Tyler. 2003. Filtrexx® International Company Website. Specifications, CAD drawings, case histories. www.filtrexx.com.

Sadhegi, A., K. Sefton, and B. Faucette. 2006. Sediment and nutrient removal from storm water with compost filter socks and silt fence. 2006

American Society of Agricultural and Biological Engineers Annual International Conference, Portland, OR. Paper No. 06XXXX.

Soil Conservation Service. 1986. Urban Hydrology for Small Watershed. Technical Release 55. US Department of Agriculture.

Tyler, R.W., and A. Marks. 2004. Erosion Control Toolbox CD Kit. A Guide to Filtrexx® Products, Educational Supplement, and Project Videos. 3 CD set for Specifications and Design Considerations for Filtrexx® Products.

Tyler, R.W., and A. Marks. 2003. Filtrexx® Product Installation Guide. Grafton, Ohio.

Tyler, R.W., and A. Marks. 2003. A Guide to Filtrexx® Products. Product Descriptions and Specifications for Filtrexx® Products.

Tyler, R.W., J. Hoeck, and J. Giles. 2004. Keys to Understanding How to Use Compost and Organic Matter. IECA Annual Meeting Presentations published as IECA Digital Education Library, Copyright 2004 Blue Sky Broadcast.

Tyler, R.W. 2004. International PCT Patent Publication #: WO 2004/002834 A2. Containment Systems, Methods and Devices for Controlling Erosion. Patent Application Filed on January 8, 2004.

Tyler, R.W. 2003. International PCT Application #: PCTUS2003/020022. Containment Systems, Methods and Devices for Controlling Erosion. Patent Application Filed on June 25, 2003.

Tyler, R.W. 2003. US Patent Publication #: 2003/0031511 A1. Devices, Systems and Methods for Controlling Erosion. Patent Application Filed on January 13, 2003.

Tyler, R.W. 2002. US Patent Application #10/208,631. Devices, Systems and Methods for Controlling Erosion. Patent Application Filed on July 31, 2001.

Tyler, R.W. 2001. Provisional Patent Application #60/309,054. Devices, Systems and Methods for Controlling Erosion. Patent Application Filed on July 31, 2001.



Tyler, R.W. 2001. Filtrexx® Product Manual. Specifications and Design Considerations for Filtrexx® Products, Grafton, OH.

Tyler, R.W. 1996. Winning the Organics Game – The Compost Marketers Handbook. ASHS Press, ISBN # 0-9615027-2-x.

Tyler, R.W. 2007. US Patent # 7,226,240 “Devices, Systems and Methods for Controlling Erosion” Issue date 6-5-07.

USEPA NPDES Phase II. 2006. Compost Filter Socks: Construction Site Storm Water Runoff Control. National Menu of Best Management Practices for Construction Sites. http://cfpub.epa.gov/npdes/stromwater/menuofbmps/con_site.cfm.

USEPA. 1998. Reissuance of NPDES General Permits for Storm Water Discharges from Construction Activities. Federal Register, Part II, Notice. US Government Printing Office, Washington, DC.


Table 9.1. Filtrexx® SoxxTM Material Specifications.

TABLES & FIGURES:

(continued on next page)

Table 9.2. Filtrexx® Sediment Trap Performance and Design Specifications Summary.

*Tested at Texas Transportation Institute/Texas A&M University (ASTM 5035-95).** Data based on Caltrans research and specifications *** Functional longevity ranges are estimates only. Site specific environmental conditions may result in significantly shorter or longer time periods.

Design Diameter

8 in (200mm) 12 in (300mm) 18 in (450mm) 24 in (600mm) 32 in (800mm) Testing Lab/ Reference Publication(s)

Design & Performance

Effective Height 6.5 in (160mm)

9.5 in (240mm)

14.5 in (360mm)

19 in (480mm)

26 in (650mm)

The Ohio State University, Ohio

Agricultural Research and Development

Center

Transactions of the American

Society of Agricultural &

Biological Engineers, 2006

Effective Circumference 25 in (630mm) 38 in (960mm) 57 in (1450mm) 75 in (1900mm) 100 in (2500mm)

Density (when filled)

13 lbs/ft (20 kg/m)

32 lbs/ft (50 kg/m)

67 lbs/ft (100 kg/m)

133 lbs/ft (200 kg/m)

200 lbs/ft (300 kg/m)

Soil Control Lab, Inc

Air Space 20% 20% 20% 20% 20% Soil Control Lab, Inc

Maximum continuous length unlimited unlimited unlimited unlimited unlimited

Staking Requirement 10 ft (3m) 10 ft (3m) 10 ft (3m) 10 ft (3m) 10 ft (3m)

Maintenance Requirement

(sediment accumulation removal at X

height)

3.25 in (80mm)

4.75 in (120mm)

7.25 in (180mm)

9.5 in (240mm)

13 in (325mm)

Material Type CottonBioSoxx™

5 mil High Density Polyethylene

(HDPE)

5 mil High Density Polyethylene

(HDPE)

Multi-Filament Polypropylene

(MFPP, previously HDPP)

Multi-Filament PolypropyleneSafteySoxx™


DuraSoxx®


DuraSoxx® (Heavy Duty)

Material Characteristic Biodegradable Oxo-degradable Photodegradable Photodegradable Photodegradable Photodegradable Photodegradable

Design Diameters 8 in (200mm), 12 in (300mm)

8 in (200mm), 12 in (300mm), 18 in (400mm)

5 in (125mm), 8 in (200mm), 12 in (300mm), 18 in (400mm)

8 in (200mm), 12 in (300mm), 18 in (400mm), 24 in (600mm), 32 in (800mm)

8 in (200mm), 12 in (300mm), 18 in (400mm)

8 in (200mm), 12 in (300mm), 18 in (400mm),24 in (600mm), 32 in (800mm)

5 in (125mm), 8 in (200mm), 12 in (300mm), 18 in (400mm)

Mesh Opening 1/8 in (3mm) 3/8 in (10mm) 3/8 in (10mm) 3/8 in (10mm) 1/8 in (3mm) 1/8 in (3mm) 1/8 in (3mm)

Tensile Strength ND 26 psi (1.83 kg/cm2) 26 psi (1.83 kg/cm2) 44 psi (3.09 kg/cm2) 202 psi (14.2 kg/cm2)* 202 psi (14.2 kg/cm2) 242 psi (16.99 kg/cm2)

% Original Strength from Ultraviolet Exposure

(ASTM G-155)ND ND 23% at 1000 hr 100% at 1000 hr 100% at 1000 hr 100% at 1000 hr 100% at 1000 hr

Functional Longevity/ Project

Duration***

up to 12 months** 6 mo-3.5 yr 9 mo-4 yr 1-4 yr 2-5 yr 2-5 yr 2-5 yr



Table 9.2. Filtrexx® Sediment Trap Performance and Design Specifications Summary. (continued)

Design Diameter8 in (200mm) 12 in (300mm) 18 in (450mm) 24 in (600mm) 32 in (800mm) Testing Lab/

Reference Publication(s)Design & Performance

Initial Maintenance Requirement

based on Rainfall-Runoff*

22 in (55 cm); 1109 L/linear m

32 in (80 cm); 1388 L/linear m

42 in (105 cm); 1825 L/linear m

64 in (160 cm); 2776 L/linear m

86 in (215 cm); 3885 L/linear m

The University of Georgia & Auburn

University

Functional Longevity** 6 mo – 5 yr 6 mo – 5 yr 6 mo – 5 yr 6 mo – 5 yr 6 mo – 5 yr

Maximum Slope Length (<2%)

600 ft (183m)

750 ft (229m)

1000 ft (305m) 1300 ft (396m) 1650 ft

(500m)



Center

Filtrexx Design Tool™, Filtrexx Library #301,

Filtrexx Tech Link #3304 & #3311

Hydraulic Flow Through Rate

7.5 gpm/ft (94 L/min/m)







Center; University of Guelph, School

of Engineering/ Watershed

Research Group

Filtrexx Tech Link #3311 & #3313, #3308;

American Society of Agricultural &

Biological Engineers Meeting

Proceedings , 2006, Second Interagency

Conference on Research in

Watersheds, 2006

P Factor (RUSLE) 0.1-0.32 0.1-0.32 0.1-0.32 0.1-0.32 0.1-0.32

USDA ARS Envi-ronmental Quality Lab/University of

Georgia



Proceedings , 2006

Sediment Storage Capacity***

174 cu. in (2850cc)

396 cu. in (6490cc)

857 cu. in (14040cc)

1631 cu. in (26840cc)

2647 cu. in (43377 cc)

Filtrexx Tech Link #3314

Total Solids Removal 98% 98% 98% 98% 98% Soil Control Lab,

Inc

International Erosion Control

Association, 2006

Total Suspended Solids Removal 78% 78% 78% 78% 78%

USDA ARS Environmental

Quality Lab

Filtrexx Tech Link #3308;



Proceedings , 2006


126 | Filtrexx® Low Impact Design Manual | Version 10.0 Construction Activities | Section 1: Erosion & Sediment Control | 126




Turbidity Reduction 63% 63% 63% 63% 63%


Quality Lab




Proceedings , 2006

Clay (<0.002mm) Removal 65% 65% 65% 65% 65%


Quality LabFiltrexx Tech Link

Silt (0.002-0.05mm)

Removal64% 64% 64% 64% 64%



TSS Removal w/PAM 97% 97% 97% 97% 97%


Quality Lab




Proceedings , 2006

TSS Removal w/Flocculent 97% 97% 97% 97% 97%


Quality Lab




Proceedings , 2006

Turbidity Reduction w/

PAM98% 98% 98% 98% 98%


Quality Lab




Proceedings , 2006

Turbidity Reduction w/

Flocculent94% 94% 94% 94% 94%


Quality Lab




Proceedings , 2006







Total Phosphorus Removal 34% 34% 34% 34% 34%


Quality Lab




Proceedings , 2006

Reactive Phosphorus

Removal38% 38% 38% 38% 38%


Quality Lab



Proceedings , 2006

Total Phosphorus Removal w/

Nutrient Agent 60% 60% 60% 60% 60%


Quality Lab



Proceedings , 2006

Reactive Phosphorus Removal w/

Nutrient Agent

99% 99% 99% 99% 99% USDA ARS

Environmental Quality Lab




Proceedings , 2006

Nitrate-N Removal 25% 25% 25% 25% 25%


Quality Lab



Proceedings , 2006

Ammonium-N Removal 15% 15% 15% 15% 15%



Ammonium-N Removal w/

Nutrient Agent33% 33% 33% 33% 33%



Motor Oil Removal w/

Hydrocarbon Agent

99% 99% 99% 99% 99%USDA ARS


International Erosion Control

Association, 2006

Diesel Fuel Removal w/

Hydrocarbon Agent

99% 99% 99% 99% 99%USDA ARS


Filtrexx Tech Link

Gasoline Removal w/ Hydrocarbon

Agent54% 54% 54% 54% 54%







Cadmium (Cd) Removal w/ Heavy Metal

Agent

73% 73% 73% 73% 73%USDA ARS


Filtrexx Tech Link

Chromium (Cr) Removal w/ Heavy Metal

Agent

47% 47% 47% 47% 47%USDA ARS


Filtrexx Tech Link

Copper (Cu) Removal w/ Heavy Metal

Agent

70% 70% 70% 70% 70%USDA ARS


Filtrexx Tech Link

Nickel (Ni) Removal w/ Heavy Metal

Agent

69% 69% 69% 69% 69%USDA ARS


Filtrexx Tech Link

Lead (Pb) Removal w/ Heavy Metal

Agent

73% 73% 73% 73% 73%USDA ARS


Filtrexx Tech Link

Zinc (Zn) Removal w/ Heavy Metal

Agent53% 53% 53% 53% 53%



Iron (Fe) Removal 22% 22% 22% 22% 22% Soil Control Lab, Inc

Manganese (Mn) Removal 8% 8% 8% 8% 8% Soil Control Lab,

Inc

Total coliform Removal 67% 67% 67% 67% 67%



E. coli Removal 67% 67% 67% 67% 67%USDA ARS


Filtrexx Tech Link

Enterococcus Removal 47% 47% 47% 47% 47%



E. coli Removal w/ Bacteria

Agent98% 98% 98% 98% 98%



Fecal coliform Removal w/

Bacteria Agent98% 98% 98% 98% 98%



Enterococcus Removal w/

Bacteria Agent91% 91% 91% 91% 91%



Other Recommended

Uses

Inlet Protection, Ditch Protection,

Slope Interruption

Inlet Protection, Ditch Protection,

Concrete Washout, Slope

Stabilization, Slope Interruption

Ditch Protection, Concrete Washout,

Filtration System


Filtration System


Filtratioin System

* Based on rainfall intensity of 12.5 cm (5 in)/hr applied to a bare clay loam soil at a 10% slope; runoff flow rate of 108 ml/sec/linear m (0.52 gpm/linear ft); and mean runoff volume of 230 L/m2 (6.3 g/ft2).** Functional Longevity is dependent on mesh material type, UV exposure, freeze/thaw frequency, region of US/Canada, runoff-sediment frequency/ duration/loading, and adherence to specified maintenance requirement. Functional longevity ranges are estimates only. Site specific environmental conditions may result in significantly shorter or longer time periods. *** Sediment Storage Capacity = sediment accumulation behind (directly upslope) + within the device.



Figure 9.1. Engineer Design Drawing for Sediment Trap.


Figure 9.2. Engineer Design Detail for Staking Sediment Traps.

filtrexx sediment trap (siltsoxx

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